S-91247A533 1"-14 x 5 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced Load Distribution with 1"-14 extra fine thread for superior grip and vibration resistance in precision assemblies
- High-Strength Performance with Grade 5 classification and 120,000 psi tensile strength for demanding industrial applications
- Superior Corrosion Protection through zinc plating, extending service life in harsh environments
- Optimized Torque Transmission with external hex drive and 1 1/2" head width for secure installation
- Precision Thread Fit with Class 2A tolerance ensuring consistent engagement and reduced cross-threading risks
- Reliable Material Integrity with Rockwell C25 hardness providing excellent wear resistance
- Versatile Partial Threading allowing both clamping and unthreaded shank benefits in various configurations
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws address critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The extra fine 1"-14 thread provides maximum surface contact for superior vibration resistance in dynamic load conditions, while the zinc plated steel construction offers essential corrosion protection in manufacturing environments. The external hex drive design ensures efficient torque application during high-volume installations, and the partially threaded configuration allows for precise clamping force distribution. With 120,000 psi tensile strength and Rockwell C25 hardness, these fasteners maintain integrity under extreme mechanical stress, making them ideal for automotive, construction, and industrial equipment applications where failure is not an option.
Specification Summary & Compliance
This hex head screw features Class 2A thread fit precision with UNS thread type and extra fine thread spacing for exacting dimensional requirements. Manufactured to meet ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, providing assurance for regulated industries and international supply chains.
